19.C[分析] 固定搭配。 protect sth.from/against...保护;如:He is wearing sunglasses to protect his eyes from the strong sunlight.他戴着太阳镜以挡强烈的阳光。因此选项C是答案
            
            
                
            
  19.C[分析] 固定搭配。
  protect sth.from/against...保护;如:He is wearing sunglasses to protect his eyes from the strong sunlight.他戴着太阳镜以挡强烈的阳光。因此选项C是答案。
  20.B[分析] 词义辨析。
  A.scarcity 缺乏,不足,罕见;B.minority 少数,少数民族;C.minimum 最小值;D.shortage 不足,缺乏:因此选项B为答案。
            
            
 
            (责任编辑:秩名)